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Dragstrip and Launch Techniques Discussion 1/4 mile, 1/8 mile, launch discussions.

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Old 10-12-2012, 11:02 PM   #1
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Decrease in performance

Approx. how many miles should a ls3 have before performance starts to decrease ?
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Old 10-12-2012, 11:13 PM   #2
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Approx. how many miles should a ls3 have before performance starts to decrease ?
Good question. I heard across the board though that GM pushrod motors are very reliable.
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Old 10-13-2012, 12:28 AM   #3
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Good question. I heard across the board though that GM pushrod motors are very reliable.
What I'm asking is if your running 12.9 at 15,000 miles how well would it run with 50,000 miles ? Will the performance decrease with the added mileage ? Approx when will it be noticeable ?
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Old 10-13-2012, 12:39 AM   #4
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With proper maintenance and all that stuff, no reason it couldn't go well beyond 100K before any meaningful drop-off.
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Old 10-13-2012, 12:51 AM   #5
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With proper maintenance and all that stuff, no reason it couldn't go well beyond 100K before any meaningful drop-off.
Wow ,,,,,,, I thought it would have been much sooner
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Old 10-13-2012, 01:06 AM   #6
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Wow ,,,,,,, I thought it would have been much sooner
I think what matters is what overall condition the engine is in, not simply the miles. I did a couple 1/4 mile runs with my Oldsmobile back when it had around 75K on it. The acceleration numbers to 70 mph were identical to the Motor Trend results when they tested one new, and the 1/4 mile time/trap speed of mine was actually marginally better (though perhaps I had a slight tailwind).
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Old 10-13-2012, 01:35 AM   #7
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I think what matters is what overall condition the engine is in, not simply the miles. I did a couple 1/4 mile runs with my Oldsmobile back when it had around 75K on it. The acceleration numbers to 70 mph were identical to the Motor Trend results when they tested one new, and the 1/4 mile time/trap speed of mine was actually marginally better (though perhaps I had a slight tailwind).
Totally agree. Well maintained and you should see a long life out of these motors.
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Old 10-13-2012, 08:42 AM   #8
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Totally agree. Well maintained and you should see a long life out of these motors.
Thanks,,,,,, I'm surprised,,,,, had no idea !!!!
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Old 10-15-2012, 09:05 AM   #9
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If well matained it will run FASTER with 30-75k miles on it... after a 100k it may fall off a bit, but not much. Trans condition and rear end condition will play a big role in this also! If you dont take care of them, it will effect the performance more then any power lost at the crank.
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Old 10-15-2012, 10:49 AM   #10
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The rings should be seated properly in the first 500 or so miles if driven hard enough, but most drive easy and the M1 full synthetic is so protective that many dont get seated properly and thus the oil consumption issues. As for power, the V8's are still port injected so the intake valves will remain clean and fairly deposit free if using top tier fuels so as long as you change oil regularly, clean air filters, etc. expect 200-300K plus miles w/no issue. We tear the LS motors down with tons of miles on showing little to no wear so these will go as long as you care to .

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Old 10-15-2012, 05:02 PM   #11
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The rings should be seated properly in the first 500 or so miles if driven hard enough, but most drive easy and the M1 full synthetic is so protective that many dont get seated properly and thus the oil consumption issues. As for power, the V8's are still port injected so the intake valves will remain clean and fairly deposit free if using top tier fuels so as long as you change oil regularly, clean air filters, etc. expect 200-300K plus miles w/no issue. We tear the LS motors down with tons of miles on showing little to no wear so these will go as long as you care to .

I think I broke it in right. After 15 to 20 passes and 3200 miles it uses less than a half quart in the 3200 miles. I think the rings are fine with that being said.

I had no idea,,,, I would have guessed power would fall off at 75k. Thanks so much,,,,
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